CVE-2021-37631 Circle can be accessed by non-Circle members in Nextcloud Deck

2021-09-0719:50:11

CWE-639

GitHub_M

www.cve.org

cve-2021-37631

nextcloud

deck

vulnerability

access control

upgrade

disable

boards

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

0.001

Percentile

49.5%

JSON

Deck is an open source kanban style organization tool aimed at personal planning and project organization for teams integrated with Nextcloud. In affected versions the Deck application didn’t properly check membership of users in a Circle. This allowed other users in the instance to gain access to boards that have been shared with a Circle, even if the user was not a member of the circle. It is recommended that Nextcloud Deck is upgraded to 1.5.1, 1.4.4 or 1.2.9. If you are unable to update it is advised to disable the Deck plugin.

CNA Affected

[
  {
    "product": "security-advisories",
    "vendor": "nextcloud",
    "versions": [
      {
        "status": "affected",
        "version": "< 1.2.9"
      },
      {
        "status": "affected",
        "version": ">= 1.3.0, < 1.4.4"
      },
      {
        "status": "affected",
        "version": ">= 1.5.0, < 1.5.1"
      }
    ]
  }
]